As a percentage 18 out of 20 is 90%
c
The answer depends on the grade boundaries
70% usually a C-
letter grade=C your dumb
60% D
38% would be an F. If you got 38 out of 60 answers correct your grade would be 63% or letter grade D or F, depending on your grading scale.
Not sure if your 64 is a paper or test grade. We also don't know the number of points possible. If you got a 64 out of 70 possible that would be an A , but if you got 64 out of a 100 that would be a low C nearly a D.
It is: 63%
Usually every "A" you receive on a report card is allocated 4 points every "B" 3 points, "C" 2 points "D" 1 point "F" (fail) 0 points The total is then divided by the number of courses for which you received a grade, and the result is the grade point average. Thus if you took six courses and received a "B" in each, you would have 18 points, divided by the six courses for a 3.0 grade point average. Of course if you took six courses, got 2 "A"s 2 "B"s and 2 "C"s you would still have 18 points divided by the six courses and, once again, a grade point Average of 3.0. That's why it's called a GPA, or Grade Point AVERAGE. A GPA 3.0 is referred to as a "B" average, it doesn't mean you got a "B" in every course, but it was the AVERAGE value of the letter grade you received
As a percentage it is 85.85%
You divide the number of points you got by the number of points possible, then multiply by 100.
Almost a D- But right now you've got an F